Thanks guys, glad you enjoyed this Christmas mini-game! We recently ramped up the difficulty so it gets progressively harder (faster / stronger enemies) as you get into the higher levels. Definitely had a good time making it and I will be sure to put up the new 8-bit "Rockin' Around The Christmas Tree" as an mp3 sometime soon.
Be sure to play the game on Newgrounds so you can collect all the medals for your account!
http://www.newgrounds.com/portal/view/556847
By the way, somebody posted a pretty solid guide for playing the game and I thought you guys might like to see it:
http://clydeark.newgrounds.com/news/post/549551